Cut-off mechanism for glass-forming apparatus.



leo

I A mold,

' blank l dottedv line representation of the mold and cut-off mechanism of Fig. 1 illustrates -theyf 13 through which slides a movable element.

14 termed the ram. The ram carries at its lower v'or outer extremity a gathering mold consisting of an upper fixed mold element 15 and a-lower'swinging mold element 16 having a port 17 through which the gather is drawn up by suction. The lower mold (element 16 is swung' on its pivot into the open position shown in the full lines in Fig. l after' the gather has been made and" the ram withdrawn from the furnace. The blank is then discharged into a spindle or .blow pipe 18 for further treatment; the machine in question being designed particularly for the manufacture of incandescent light bulbs. l The particular construction of the mold, and of the and therefore will not be described further.

The furnace is designated 19,its working opening 20, and the refractory ring which oats on the surface of the metal, 2l. The ram is moved in and out of the working opening of the furnace by any suitable mechanism; The 'drawing shows, in part, the mechanism shown in my previous application., A rack 22 is provided on the upper side of the ram which is meshed by a pinion 23 on a shaft 24 mounted in the housing 13. In rigid relation with pinion 23 is a smaller pinion 25 which is meshed by a rack 26 on a slide 27. i imparted to the slide 27 through mecha'- nism (not shown).

The purpose of the cut-oli` mechanism forming the subject matter of this application is to remove from the bottom of the blank any surplus metal that may ladhere thereto, that is, to cut off 'the gather Hush with the bottom of the mold. The cut-off preferably takes place while the gather and its innermost point at which the is delivered to the spindle. The

point at which the cut is made. The metal, under normal conditions, will. fall back into the working opening. If, however, the cut is jerky, which' will be the case should the metal be too cold or should the'knife meet 'with some obstruction such as a hard lump or stone, the glass, instead of being thrown back linto the ring, as sometimes happened with the/machine as or'giiially constructed, is .simply thrown out of the working opening whichdces no harm.

The cut-off mechanism is constructed as follows: 28 is a blade bolted to the L-shaped shank 29 formed with a slot 30 and secured tothe. pivoted arm 31 by means of the set screw 32 -which passesithrough the The pivoted arm 31 is formed with a lug 33 through which extends thie adjusting l spindle and the mecha- Y msm employed for-opening and closing the do not concern the present invention the socket ,roller 47 which extends Movements back and, forth are ram is ap-. proximately midway between the point of 'bell crank 4b is slot 30.v

screw 34 which is held in place by the coli lars and which engages a threaded opening 3G in the top of the shank 29. This arrangement gives adjustability for the purpose of taking up wear. The upper ysurface of the blade 28 is concaved and its forward or cutting edge 37 is oblique to the line of movement of the knife so gives a shearing cut. a pivot 38 extending through the end of theram 14 and through the arm 3l, the latter being secured to the pivot by a pin 38a. The knife is swung back and forth on its pivot by' means of an operating rod on the ram which is. reciprocated by engagement with a stationary cam. The operating rod preferably consists oftwo members 39 and 40, the former extending intoa socket 41 securedv to the latter. The rod 39 carries at its inner end the transverse pin 42, the endsof which project into slots 43 in the socket 41. 44,is a tension spring secured to 41 and to a collar 45 on lthe rod 39. Pi'voted to the upper end of the ram is a bell `crank 46, one arm of which carries a into the box cam 48 rigidly connected with the carriage 1Q. As the roller 47 travels' in a box cam instead of on top of an inclined surface as in t-he old machine there is no tendency for the cut-off mechanism to raise the ram and cause arleakage between the registering air ports in thev ram and its supports. The upper cam surface of the boxv cam holds the ram down upon the surface of vthe carriage `on which it slides. The lower cam surface keeps the knife from vibrating as it otherwise would. In describing the cam 4S as stationary it will be understood that the term is used in a relative sense, tive to the longitudinal .or radial movement of the rain. In the embodiment of the invention shown all -of "thev apparatuses described are `.mounted upon the spider 11 which "is revoluble. The other arm of the connected by means of the coupling member-49 to the rod 40. The rod 39 is formed on its lower end with the eyelet 50 'through which extends the pin 51 couof the cam 48,-'it being understood that when the ram is in position to make the gather the roller 47 is at the outer end of the cam 48, that is, in the position opposite to that shownin Fig. 1. The movement of vthe roller 47 through the inclined portion 53 of the cam slot Icauses the bell crank to rock toward the drum 10 which pulls on the operating rod 40,;39 and draws the knife across the mold cutting oi'f w iatever sur- 'plus glass there may be at the inlet port of that the knife The knife .swings on that is, rela- The 4spring is. stiff enough so that if the:

the mold. The further movement inward of `the ram brings the roller 47 into the por- .tion of the cam slot designated 54 which has' an opposite inclination and by `this means the knife is returned to its normal position.,

It will bc understood that these same movements take place in reverse order when thc ram -is moved doiyn toits gatherin` position. These movements of the km c are7 of course, idle movements.

The operating rod has4 the telescopic com' struction shown so that the knife and its actuating mechanism will'not be injured in ease' the knife encounters some hard sob- 4stance in the glass. The sections of the rod are simply linked together bythe spring 4,4.

glass :is of' normal .consistency it will not stretch. If the knife meets with any considerable obstacle the spring 44 will yield. When the knife wears it may be drawn to- Ward the mold by loosening screw 32 and turning screw 34.

lVhile I have described my invention in a preferred embodiment, it 'will be readily Aunderstood that modifications might bedevised withoutfdepart-ure from the invention.

l 'Therefore I do 4not limit the Ainvention -to limitations in certain the particulars described and claimed except so far-vas. they are madespecically of the claims herein.

-Iclaimzl Y. 1. In apparatus for gathering glass. the combination with ara-m, a gathering mold on' the rami a cut-off device pivoted tothe lram, an operatingiro'd secured-to the cutoff device, a 4fired cam, and a'bell crank pivoted 'to theram, one arm of which engages' the cam, the"operatingV rod"being secured "to the other arm, saidoperatngrodcomnism adapted to enterV 'and be 'w1tlidranarnl from said containing, means .and provided.

.spring connecting 'said'members '25,111 apparatus forgathermg prising two telescopic members, and a glassi the combination with containing means for a supply of molten glass, of gathering mecha- WitltiV an intake port, a cut-oli' knife standing'normally away from the lSaid port across said. intake port from side to. side,V and means for movingsaid'kni'fe sov as to make .the cutvinfa direction Vaway from-said con- -tainingmeans and immediately return the knff to4 normal position.'

in apparatus foqgnhering glass, the

,combination with containingA means 'for' a 'supply of molten glam, of gathering mechanismniovable into and out of said containl ing meansV and provided' withv an intake portha vcut-olf `knife A standing normally away=fronrsaid port across said intake 'port from sidetoside,and mechanism for operat 4 the' cutoff knife' as the gathering device which from said containing means gives the-knife'fits active stroke4 in combination with containing means supply of moltenglass, of aV ram movable a direction away from the containing means and immediately following said active stroke returns the knife to normal osition..

means to make the out and for immediately returning the knife to normalposition.

`5. In 'apparatus' for gathering glass, th combination with containing means for a supply .of molten glass, Ofen ra`m movable into and out of said containing means, a cut-ofi' knife pivoted to the ram, an operating rod connected with said knife, and a fixed'cam a bell crank, one arm of which engages the cam, the operating rod being connected to the other arm, the cam being formed so that the'active stroke of the knife is away'from the said` containirigfmeans.

6. In .apparatus for gathering` glasa the or a into and ont of said containing means,` a cutoff knife pivoted to the ram, an operating rod'connected .with said knife, and a' fixed canna bell crank, one arm of which engages the ca in, the operating 'rod being connected I to the other arm, .the cam being formed so that the active strokeA of the'knife is away from the said containing means, said opcreating rod comprising two telescoping members and a spring connecting'the saine together. e

7. In' apparatus for gathering glass, the combination with containing means for a supply of molten glass', of a r'a'm'moif'able into and out of saidV containing means, a

mold onsaid ram formed with an intake' port on its y.under side, aknife 'standing norf mally away from saidlintake port, piyoted tothe end of the ram', landfprovided with a blade adapted-to be mojed across the' intake" port of the moldfrom a' po'sitinfonone side of themold to a position onjthe otherj4 -and mechanism operated. by. the movements of said 'ralmlfori causing'the' knifev to Vpas'sfback and forth across said intak"'port re-l turn'ir'rimediately to normal position.' i

v- -8. In' apparatns for gathering glass, the 4combination with containing :means for a supply-'of'molten glass, of a rammovable .into and out of said containing means, a'

mold on said ram formed ycfithY an .intake port .on its .under s ide,ia knife. pivotedto the end of the vrainprovided. yyith ablade adapt- '130i ed to be moved across the intake port of the supply of molten glass,

said containing means,

mold from a position on one side of the mold to a position on the other, and mecha'- nism operated b the movements ofsaid ram for causing the ife to pass back and forth, across said 'intake port, the forward edge .of said blade being diagonal with res ct to the' direction of movement of the bla e so .as to give the glass a shearing cnt. l

9. In apparatus for gathering glass, the combination with containing means for a of a ram movable in the direction'of its length into and out of said containing means, a gathering mold on said ram provided With an intake port, a cnt-a` device pivoted to the extremity of the ram, and mechanism operated by the move-f ment of the ram away from said containing. means for passing said cut-off device across. said intake port inthe direction away from said mechanism being adapted to normally hold said cut-ofi' device in position outwardly of said mold.

10. In apparatus for gathering glass, the

Vcombination with containingv means for a supply 'of molten glass, of a -ram movable in the direction-of its said containing means, a gatheringmold at the end of said ram provided'with an intake port, a cut-0E device.pivoted to the end of said ram and normally standing' outwardly vof said gathering mold, and mechanism for causing said knife to 'lpass across said intake port comprising a be crank pivoted to the stroke it moves in length into and out of ram, an operating rod connecting the bell crank Withfsaid cut-off device, an element fixed with reference to the longitudinal movement of said ram formed in one side with a cam slot,` and a member on said bell crank which operates in said cam slot.

11. In apparatus for gathering glass, the combination with a4 movable f ram, of a gathering mold on the ram, a cut-off device pivoted to the ram, and mechanism for actuating .the cut-0E device so that in its active the direction of travel of the ram. y

12. In apparatus for gatherin'gglass, the combination of reciprocating gathering mechanism provided with an intake port7 a cut-off knife standing normally away from said port, and means for moving said knife across said intake port so as to make-its cut in the direction of movement of the gathering mechanism.

13. In apparatus for gathering glass, the combination of reciprocating gathering mechanism provided with an intake port, a cut-0E knife standing normally a'way from saidport, and means for moving said knife across said -intake port so as to make its cut in the direction of movement of the gatheri mechanism and for immediately returning the knife vto said norm'al'position.

4 AUGUST KADOW.

' Witnesses:

GEOGRE E. DIXON, L. F. LUscoME.

I t is hereby celrtied that. 'x11 Letters Patent N o.' 1,208,791, grnnw-I Deu-:mbar 19, 1916, upon the application of August Kedow,of Toledo, Ohio, for :in improvement in ,Cut-O Mechaniem for Glace-Forming Appell-ams," errore appcr 'm the 4prnted specification requiring correction as follows: Page 3, lines l49-50, ci im 2, and Ilmos 61-62, clalm 3, strike out; the 4wordsy 'acrcssV seid* intake port. from sdeto sido";

same page, line y51, claim 2, and line G3, cluiin 3, aft-or the wor'cl knife "'ipsert the worden across said intake port from side to side; and that. tllexxal'gl Letten Palzenl;

houle t read 'with um@ @mmnlgprin um chu am@ may conform-tg the record of the .casein the Patent l u signed-d ma this sth dyg'f Febgary, A. 11,1917. 

